Ok so i was browsing youtube and notice several people are putting single coils in there obs engine and this is perfect for me because i do not make my coils yet i buy them pre built. So i have almost 25 single coils laying around doing nothing they are dual heating twisted kanthal. I included pic of my first try so far i like .16 ohms vaping at 70 watts and it handles like a champ. Let me know your thoughts.